Waveguide busbar

Abstract

A waveguide busbar for converting a plurality of high-frequency input signals into high-frequency output signals, includes a waveguide, a plurality of input ports, which are arranged along the waveguide, such that each input port is intended to receive a high-frequency input signal, an output port on the waveguide for delivering the high-frequency output signal and at least one parallel resonator, which is connected to the waveguide busbar between two input ports. The parallel resonator has a mechanically adjustable volume with which a phase relation of the waveguide is adjustable between the two input ports.

What is claimed is: 
     
       1. A waveguide busbar configured to convert a plurality of high-frequency input signals into a high-frequency output signal, the waveguide busbar comprising:
 a waveguide; 
 a plurality of input ports, which are arranged along the waveguide, such that each input port is configured to receive a high-frequency input signal; 
 an output port on the waveguide configured to deliver the high-frequency output signal; 
 a parallel resonator connected to the waveguide busbar between two input ports; 
 wherein the parallel resonator is configured with a mechanically adjustable volume with which a phase relation of the waveguide between the two input ports is adjustable. 
 
     
     
       2. The waveguide busbar according to  claim 1 , wherein the parallel resonator comprises an actuator configured to alter the volume of the parallel resonator. 
     
     
       3. The waveguide busbar according to  claim 2 , wherein the actuator comprises a thermomechanical actuator. 
     
     
       4. The waveguide busbar according to  claim 3 , wherein the thermomechanical actuator is configured to change the volume of the parallel resonator so that a change in the phase relation of the waveguide because of expansion of the waveguide due to a change in temperature is reduced by the parallel resonator. 
     
     
       5. The waveguide busbar according to  claim 2 , wherein the actuator comprises an electromechanical actuator. 
     
     
       6. The waveguide busbar according to  claim 5 , further comprising:
 an electronic controller, which is configured to control the electromechanical actuator, such that a change in the phase relation of the waveguide because of an expansion of the waveguide due to a change in temperature is reduced by the parallel resonator. 
 
     
     
       7. The waveguide busbar according to  claim 1 , wherein the parallel resonator has a resonant volume of a variable length. 
     
     
       8. The waveguide busbar according to  claim 1 , wherein the parallel resonator comprises a movable slide element in a hollow space. 
     
     
       9. The waveguide busbar according to  claim 1 , further comprising:
 a plurality of parallel resonators. 
 
     
     
       10. The waveguide busbar according to  claim 9 , wherein at least one of the plurality of parallel resonators is connected to the waveguide between two neighboring input ports. 
     
     
       11. The waveguide busbar according to  claim 9 , wherein at least two parallel resonators are connected to the waveguide between two neighboring input ports. 
     
     
       12. The waveguide busbar according to  claim 1 , further comprising:
 a plurality of connecting pieces, which are connected to the input ports; wherein phase lengths of waveguide sections between the two input ports and phase lengths of the connecting pieces are set for predefined frequencies of the high-frequency output signals. 
 
     
     
       13. The waveguide busbar according to  claim 1 , wherein a resonant range of the parallel resonator is set for a pass band of the waveguide busbar. 
     
     
       14. An output multiplexer, comprising:
 a waveguide busbar configured to convert a plurality of high-frequency input signals into a high-frequency output signal, the waveguide busbar comprising
 a waveguide; 
 a plurality of input ports, which are arranged along the waveguide, such that each input port is configured to receive a high-frequency input signal; 
 an output port on the waveguide configured to deliver the high-frequency output signal; 
 a parallel resonator connected to the waveguide busbar between two input ports; 
 wherein the parallel resonator is configured with a mechanically adjustable volume with which a phase relation of the waveguide between the two input ports is adjustable; 
 
 a plurality of channel filters which are connected to the input ports of the waveguide busbar. 
 
     
     
       15. A communication satellite, comprising:
 an output multiplexer, comprising
 a waveguide busbar configured to convert a plurality of high-frequency input signals into a high-frequency output signal, the waveguide busbar comprising
 a waveguide; 
 a plurality of input ports, which are arranged along the waveguide, such that each input port is configured to receive a high-frequency input signal; 
 an output port on the waveguide configured to deliver the high-frequency output signal; 
 a parallel resonator connected to the waveguide busbar between two input ports; 
 wherein the parallel resonator is configured with a mechanically adjustable volume with which a phase relation of the waveguide between the two input ports is adjustable; 
 
 a plurality of channel filters which are connected to the input ports of the waveguide busbar.